Can someone pls help me ASAP :/

What percent of the circle below is shaded?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).